JPS5764338A - Optical information reproducer - Google Patents

Optical information reproducer

Info

Publication number
JPS5764338A
JPS5764338A JP55139370A JP13937080A JPS5764338A JP S5764338 A JPS5764338 A JP S5764338A JP 55139370 A JP55139370 A JP 55139370A JP 13937080 A JP13937080 A JP 13937080A JP S5764338 A JPS5764338 A JP S5764338A
Authority
JP
Japan
Prior art keywords
jump
light beam
circuit
signal
sample holding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP55139370A
Other languages
Japanese (ja)
Inventor
Yuji Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55139370A priority Critical patent/JPS5764338A/en
Publication of JPS5764338A publication Critical patent/JPS5764338A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head

Landscapes

  • Moving Of The Head To Find And Align With The Track (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

PURPOSE:To reproduce a stable static picture, by inserting a sample holding circuit into a tracking servo-circuit, sampling a tracking control signal immediately before a light beam is made to jump, and making the light beam jump. CONSTITUTION:When reproducing a static picture, a jump timing controlling circuit 17 detects a frame signal, and a tracking control signal is held by a sample holding circuit 15. An output of the sample holding circuit 15, and a jump pulse from a jump pulse generator 19 are added and inputted to an optical deflector 11, and a light beam is made to jump by 1 track. To the optical deflector 11, an added signal of the jump pulse and the tracking signal immediately before starting the jump is inputted, therefore, the jump width always becomes constant. Also, after the jump has ended, the light beam is led in stably since the jump width of the light beam, and the track space are in coincidence. In this regard, in the figure, a light source, a disk, a signal detector, a compensating circuit and an adder are denoted by 10, 12, 13, 14 and 16, respectively.
JP55139370A 1980-10-07 1980-10-07 Optical information reproducer Pending JPS5764338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55139370A JPS5764338A (en) 1980-10-07 1980-10-07 Optical information reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55139370A JPS5764338A (en) 1980-10-07 1980-10-07 Optical information reproducer

Publications (1)

Publication Number Publication Date
JPS5764338A true JPS5764338A (en) 1982-04-19

Family

ID=15243739

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55139370A Pending JPS5764338A (en) 1980-10-07 1980-10-07 Optical information reproducer

Country Status (1)

Country Link
JP (1) JPS5764338A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529423A1 (en) * 1982-06-25 1983-12-30 Pioneer Electronic Corp ASSIGNED ALIGNMENT DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2529423A1 (en) * 1982-06-25 1983-12-30 Pioneer Electronic Corp ASSIGNED ALIGNMENT DEVICE

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